Intermetallic Compounds in the Banded Structure and Their Effect on Mechanical Properties of Al/Mg Dissimilar Friction Stir Welding Joints

Shi, Hui; Chen, Ke; Liang, Z.Y.; Dong, Fengbo; Yu, Tao; Dong, Xianping; Zhang, Lanting; Shan, Aidang

doi:10.1016/j.jmst.2016.05.006

Cited by 106 publications

(45 citation statements)

References 22 publications

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“…Recently, magnesium and aluminum alloys are used extensively in the aerospace and electronics industries due to their excellent properties such as high specific strength, good corrosion resistance [3,4], and electromagnetic shielding properties [5]. However, there are several problems in welding of Al/Mg alloy such as: (i) large thermal stress in welding which would lead to hot cracks, (ii) unstable metallurgical bond results from difference of lattice types, and (iii) intermetallic compounds (IMCs) formed at high temperatures which would seriously deteriorate the properties of the joints [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Tool Offset on the Microstructure and Properties of AA6061/AZ31B Friction Stir Welding Joints

Liu

Chen

et al. 2020

Metals

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Friction stir welding was carried out on AA6061/AZ31B alloy, and the influence of tool offset on microstructures and mechanical properties of the joints was studied. The results showed that preferred properties were obtained when Mg was placed in the Advancing Side (AS) and offset was positioned into Mg. The distribution of Al3Mg2 and Al12Mg17 intermetallic compounds (IMCs) could be improved with offset in a certain range. The tensile strength of the joints was elevated with the increase of the offset due to the superior distribution and diminished size of IMCs, and when the offset was 1.5 mm, the joint strength reached the maximum value of 107 MPa. The microhardness of the stirring zone decreased with the increased offset.

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Section: Introductionmentioning

confidence: 99%

Effect of Tool Offset on the Microstructure and Properties of AA6061/AZ31B Friction Stir Welding Joints

Liu

Chen

et al. 2020

Metals

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“…Thus, joints welded were visually inspected for good shape and no scrap. Due to the high temperature in the welding process, the During the dissimilar material FSKSW process, intermetallic compounds were formed by element diffusion [28,29]. The material in thermo-mechanically affected zone (TMAZ) near the surface of the weld transfers downwards, and the material in the middle of weld moves upward, as a result of formation mechanical connection [30].…”

Section: Methodsmentioning

confidence: 99%

The Role of Mechanical Connection during Friction Stir Keyholeless Spot Welding Joints of Dissimilar Materials

Liu

Wang

et al. 2017

Metals

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Abstract:Contrast experiments of lap joints among dissimilar AZ31B Mg alloy, Mg99.50, zinc-coated DP600 sheet, and non-zinc-coated DP600 sheet were made by friction stir keyholeless spot welding (FSKSW) and vacuum diffusion welding (VDW), respectively. Scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS) were used to investigate the microstructures and components of the joints welded. The experimental results show that the FSKSW bonding method is a kind of compound mode that contains a mechanical connection and element diffusion fusion connection, in which mechanical connection has the main decisive function on joints of Mg/steel. Elements diffusion exists in the interfacial region of the joints and the elements diffusion extent is basically the same to that of VDW. The elements' diffusion in Mg/steel using FSKSW is defined in the reaction between small amounts elements of the base metal and zinc-coated metals. The intermetallic compounds and composite oxide perform some reinforcement on the mechanical connection strength.

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“…In their further study [10], due to the enhanced mechanical stirring effect, most of the IMC particles that entered the SZ with more severe material flow were more refined in the joint obtained under a longer dwell time. In addition, the softening of Cu produced by the large heat input caused the large-sized Cu block to be separated from its matrix and evolved into the multi-phase layered structures through the Al-Cu interaction [68,69].…”

Section: Materials Flowmentioning

confidence: 99%

Friction Stir Spot Welding of Aluminum and Copper: A Review

Zhang

Wang

et al. 2019

Materials

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Aluminum (Al) and copper (Cu) have been widely used in many industrial fields thanks to their good plasticity, high thermal conductivity and excellent electrical conductivity. An effective joining of dissimilar Al and Cu materials can make full use of the special characteristics of these two metals. Friction stir spot welding (FSSW), as an efficient solid-state welding method suitable for joining of dissimilar metal materials, has great prospects in future industrial applications. In this paper, the FSSW studies on Al-Cu dissimilar materials are reviewed. The research progress and current status of Al-Cu FSSW are reviewed with respect to tool features, macroscopic characteristics of welded joints, microstructures, defects in welds and mechanical properties of joints. In addition, some suggestions on further study are put forward in order to promote the development and progress of Al-Cu FSSW studies in several respects: material flow, thermal history, addition of intermediate layer, auxiliary methods and functionalization of Al-Cu FSSW joint.

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Intermetallic Compounds in the Banded Structure and Their Effect on Mechanical Properties of Al/Mg Dissimilar Friction Stir Welding Joints

Cited by 106 publications

References 22 publications

Effect of Tool Offset on the Microstructure and Properties of AA6061/AZ31B Friction Stir Welding Joints

Effect of Tool Offset on the Microstructure and Properties of AA6061/AZ31B Friction Stir Welding Joints

The Role of Mechanical Connection during Friction Stir Keyholeless Spot Welding Joints of Dissimilar Materials

Friction Stir Spot Welding of Aluminum and Copper: A Review

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